240 SWINE IN AMERICA 



made in 1890 by the New York (Cornell) station (Bul- 

 letin No. 25) with sugar beets and mangels as grown for 

 live stock. The beets and mangels were given the same 

 care, cultivation and fertilizing that would ordinarily be 

 given a farmer's root crop. Test weights gave a yield 

 of 23.1 tons of sugar beets per acre and 31.4 tons for 

 mangels. The yield of dry matter per acre was found 

 about equal, so the conclusion reached was that "the 

 difficulty in starting and in harvesting the sugar beets 

 becomes the main difference in raising the two crops. It 

 requires fully twice the labor to harvest the sugar beets, 

 so that it would seem clear that, if roots are to be raised 

 for stock, so far as yield per acre is concerned, mangels 

 are much to be preferred to sugar beets." 



COMPARATIVE VALUE OF ROOTS 



The comparative feeding value of roots most com- 

 monly used for swine was tested in 1901 at the Central 

 experimental farm of Canada. Four lots of four pigs 

 each were fed respectively on turnips, mangels and 

 sugar beets, the beets fed to one lot being grown for for- 

 age and to another lot beets as grown for sugar produc- 

 t'um. Each pig was given all the pulped roots he would 

 eat and in addition daily three pounds of skim milk and 

 a meal mixture of one-half corn and one-sixth part each 

 of oats, barley and peas. The results of the experiment 

 r Annual report of Canadian experimental farms, 1901) 

 are shown on the next page. 



In arriving at costs of the gain the meal was valued 

 at 90 cents and the skim milk at 20 cents per 100 pounds, 



